Consider the network shown in the figure below. In this network, the following addresses are used.

• host A : 2001:db8:1341:1::A and its default route points to 2001:db8:1341:1::1
• host B : 2001:db8:1341:4::B and its default route points to 2001:db8:1341:4::4

The routers have one address inside each network :

• router R1 uses address 2001:db8:1341:1::1 on its West interface, address 2001:db8:1341:12::1 on its East interface and address 2001:db8:1341:13::1 on its South interface
• router R2 uses address 2001:db8:1341:12::2 on its West interface, address 2001:db8:1341:23::2 on its South-West interface and address 2001:db8:1341:24::2 on its South interface.
• router R3 uses address 2001:db8:1341:34::3 on its East interface, address 2001:db8:1341:23::3 on its North-East interface and address 2001:db8:1341:13::3 on its North interface
• router R4 uses address 2001:db8:1341:34::4 on its West interface, address 2001:db8:1341:24::4 on its North interface and address 2001:db8:1341:4::4 on its East interface

The forwarding paths used in a network depend on the forwarding tables installed in the network nodes. Sometimes, these forwarding tables must be configured manually.